singhc10
Forum Replies Created
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@SeasonHairCare02 KSG-016F(INCI:Dimethicone (and) Dimethicone/Vinyl Dimethicone Crosspolymer from Shinetsu
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@Laurentia2021 look at the composition hints in the attached file, try contacting BASF directly, Brenntag lately having a lot of issues
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@Abdullah Check regulations in your jurisdiction where you are selling the product. In North America, no restriction on mixing them and the pH has to be greater than 3.5. In fact, Deciem’s Ordinary uses Salicylic Acid and Citric acid combination
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@heavenly4u
I have used menthol in scalp treatment(leave on) at 0.2%, you can also look at menthol derivatives for cooling effect and reduced irritation from Symrise, trade names are Frescolats -
I am not sure if this would work, you could try Oleocraft HP-31 (INCI:Polyamide-3) from Croda, it has the potential of thickening your system, since you have 50% propylene glycol in your formulation. Good Luck
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@Henry your problem is most likely coming from PEG-150 Distearate, I dont think you need it in the formulation, you already have about more than 9% of fatty alcohols
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@ its other way, SLES is milder than SLS
Ethoxylation causes following:- Reduce irritancy(milder to skin)
- Decreases salt viscosity response(need more salt to thicken SLES than SLS)
- Reduces foaming
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@Perry Benzene residue most likely always going to be there. I have worked with synthesis of aromatics and Freidel Crafts.Possibly the reaction for synthesis of precursor molecules is the source of benzene traces
Benzene —>toluene—>benzaldehyde—>tertbutyl benzaldehyde(precursor in avobenzone synthesis)Another possible source could be fragrance components such as Lilail or benzaldehyde.Most of the organic sunscreens have fragrance
For analytical testing, possibly using qNMR, for detection of such low levels of benzene.
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ALS/ALES are harsher than SLS/SLES, we mainly use ALS/ALES in industrial products, while SLS/SLES in hair shampoo. For hair shampoo , try them between 5-7% (100%active). It will take time, for aerosol cans it takes about a month. For production tanks, maybe 3 months or never.
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Storage of water based product for long time in stainless steel will cause corrosion, I work with steel and aluminum aerosol cans
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Worked with ALS and ALES, never encountered this problem. Here is the Stainless steel compatibility chart https://rexel-cdn.com/Products/70D217C4-A2DA-4789-8D40-1BF37DC74F93/70D217C4-A2DA-4789-8D40-1BF37DC74F93.pdf
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@pharma ahaha I did not see the natural part, yea its tough then
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@Leo Try using oil structuring agents Oleocraft MP-32 (INCI: Polyamide-3) or Oleocraft LP-20 from Croda, https://www.crodapersonalcare.com/en-gb/products-and-applications/product-finder/product/2464/OleoCraft_1_MP-32
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- For dust particles, SLES, SLS, AOS or their combination would work.
- Oil is basically triglyceride, while sebum exists more as a particle, combination of esters, triglyceride, cholesterol, squalene, dead skin cells and dirt.
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@Abdullah Anionic are known to remove particulates like dust and sebum, while non-ionic surfactants work well on removing oils. Anionic surfactants will be helpful removing both the scalp flakes and conditioning ingredients, though conditioning agents might need multiple washes to be fully removed. If you have too much oil, blend of anionic and non-ionic is preferred.
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@Graillotion I have this silicone from ShinEtsu called KSG-016F(INCI:Dimethicone (and) Dimethicone/Vinyl Dimethicone Crosspolymer) in a Leave In Conditioner, 2% in the formulation provides really silky feel and provides matte finish. https://www.ulprospector.com/en/na/PersonalCare/Detail/2366/238774/KSG-016F
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ISO 11930 is written for only cosmetics, while the USP 51 covers testing of cosmetics, NHPs and drugs. If you are in North America, you can go with USP 51.
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- @chickenskin
- I think it depends on the type of product and what raw materials being used in the product. If it is a simple lotion/cream, you could simply do one pot reaction and homogenize. But in some cases when you have inorganic or some organic actives, For example: Zinc Oxide sunscreen, you want to disperse it in oil phase and then add to water phase. Adding ZnO directly mixture of water and oil would not give very good product.
- Another reason could be scale up of the product, In lab you have may be 1-5kg of product, you can shear it higher rate and see the product top to bottom in glass beaker. In scale up, they would want to make sure everything is fully dispersed, nothing precipitates or agglomeration of materials. So replication of 2 pot lab method for product upscale
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12% Polysorbate is your main problem and you also have 6% Coco-Glucoside. That’s too much non-ionic surfactants. Non Ionic surfactant are milder on the skin in leave on applications, but In a rinse off system, they are really good at disrupting and extracting lipids from bilayer. In your formulation, you are using Polysorbate as an oil solubilizer, but quantity is so much that its extracting lipids out of skin making the skin dry. If you really want to add oils in to your body wash, add them at claim amount like 0.1% and you would not need much polysorbate then. Non-Ionics surfactants are like double edged sword, really kind to skin proteins, but will extract lipids out of bilayer. In a rinse off system, stick with anionic surfactants, unless you have really oil skin or scalp and you want to remove oil. Good Luck
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@Shams For In Situ emulsion with stearic acid, you would need to to go between pH 6.5-7.5 for complete saponification, Saponification is irreversible reaction, so you could re adjust the pH with Citric acid of your emulsion. Still advise to look at the stability
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We use it in ethanol based hand sanitizing foam, it is also an moisturizing agent. We buy it from Siltech, but check with DOW or https://www.ulprospector.com/en/na/PersonalCare/Detail/6393/552643/PEL-SIL-bis-PEG-12?st=1&sl=104419400&crit=QmlzLVBFRy0xMiBEaW1ldGhpY29uZQ%3d%3d&ss=2
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Use Bis PEG-12 Dimethicone at 2%, it even foams ethanol. Hopefully it would work in your formulation
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SLMI is easily thickened with salt, while SLI does not thicken with salt. Probably going to need to use other secondary surfactants, probably amides
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It seems Option B has more silicone, but still got to look at MSDS. On the other hand, I have used option A at 2% in a styling mousse. it has a better pH range (slightly more acidic) and you get to list extra ingredient.
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@Abdullah
Possibly starting from cetyl alcohol or fragrance, just a guess